新聞:民眾鎮(zhèn)106兩相步進(jìn)馬達(dá)57HD4402銷售部
有關(guān)伺服零點(diǎn)開關(guān)的問題。
找零的方法有很多種，可根據(jù)所要求的精度及實(shí)際要求來(lái)選擇。可以伺服電機(jī)自身完成（有些品牌伺服電機(jī)有完整的回原點(diǎn)功能），也可通過上位機(jī)配合伺服完成，但回原點(diǎn)的原理基本上常見的有以下幾種。
一、伺服電機(jī)尋找原點(diǎn)時(shí)，當(dāng)碰到原點(diǎn)開關(guān)時(shí)，馬上減速停止，以此點(diǎn)為原點(diǎn)。
二、回原點(diǎn)時(shí)直接尋找編碼器的Z相信號(hào)，當(dāng)有Z相信號(hào)時(shí)，馬上減速停止。這種回原方法一般只應(yīng)用在旋轉(zhuǎn)軸，且回原速度不高，精度也不高。
同步帶的安裝對(duì)伺服定位也有很大影響嗎。
這個(gè)情況，得知道伺服是不是調(diào)得很軟？常見伺服是用脈沖控制的，那么，位置環(huán)的比例增益，速度環(huán)比例增益、積分時(shí)間常數(shù)分別是多少？
位置環(huán)比例增益：21rad/s
速度環(huán)比例增益：105rad/s
速度環(huán)積分時(shí)間常數(shù)：84ms
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新聞:民眾鎮(zhèn)106兩相步進(jìn)馬達(dá)57HD4402銷售部
上述因素的影響也因塑料材料的不同，或者其它成型條件如溫度、濕度、繼續(xù)結(jié)晶化、成型后的注塑機(jī)的變化而不同。由于注塑過程是把塑料從固態(tài)(粉料或粒料)向液態(tài)(熔體)又向固態(tài)(制品)轉(zhuǎn)變的過程。從粒料到熔體，再由熔體到制品，中間要經(jīng)過溫度場(chǎng)、流場(chǎng)以及密度場(chǎng)等的作用。在這些場(chǎng)的共同作用下，不同的塑料(熱固性或熱塑性、結(jié)晶性或非結(jié)晶性、增強(qiáng)型或非增強(qiáng)型等)具有不同的聚合物結(jié)構(gòu)形態(tài)和流變性能。凡是影響到上述因素必將會(huì)影響到塑料制品的物理力學(xué)性能、尺寸、形狀、精度與外觀質(zhì)量。
新聞:民眾鎮(zhèn)106兩相步進(jìn)馬達(dá)57HD4402銷售部
行星減速機(jī)主要傳動(dòng)結(jié)構(gòu)為:行星輪,太陽(yáng)輪,外齒圈. 行星減速機(jī)因?yàn)榻Y(jié)構(gòu)原因,單級(jí)減速為3,一般不超過10,常見減速比為:3.4.5.6.8.10,減速機(jī)級(jí)數(shù)一般不超過3,但有部分大減速比定制減速機(jī)有4級(jí)減速.
相對(duì)其他減速機(jī),行星減速機(jī)具有高剛性,高精度(單級(jí)可做到1分以內(nèi)),高傳動(dòng)效率(單級(jí)在97%-98%),高的扭矩/體積比,終身免維護(hù)等特點(diǎn).
因?yàn)檫@些特點(diǎn),行星減速機(jī)多數(shù)是安裝在步進(jìn)電機(jī)和伺服電機(jī)上,用來(lái)降低轉(zhuǎn)速,提升扭矩,匹配慣量.那么我們?cè)谟玫倪^程中要注意什么呢？
1.減速機(jī)額定輸入轉(zhuǎn)速可達(dá)到18000rpm(與減速機(jī)本身大小有關(guān),減速機(jī)越大,額定輸入轉(zhuǎn)速越小)以上,工業(yè)級(jí)行星減速機(jī)輸出扭矩一般不超過2000nm,特制超大扭矩行星減速機(jī)可做到10000nm以上.工作溫度一般在-25℃到100℃左右,通過改變潤(rùn)滑脂可改變其工作溫度。
新聞:民眾鎮(zhèn)106兩相步進(jìn)馬達(dá)57HD4402銷售部
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